#-------------------------------------------------------------
#
# (C) Copyright IBM Corp. 2010, 2015
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#-------------------------------------------------------------


args <- commandArgs(TRUE)
options(digits=22)
library("Matrix")

A = as.matrix(readMM(paste(args[1], "A.mtx", sep="")))
m = as.integer(args[2]);
left = as.logical(args[3]);

#note: this outer formulation is equivalent to table but does not 
#  require padding and convertion from R's factor-based table

if( left ){
   C = outer(as.vector(A), seq(1,m), "==");
} else {
   C = outer(seq(1,m), as.vector(A), "==");
}


writeMM(as(as.matrix(C), "CsparseMatrix"), paste(args[4], "C", sep="")); 
